Pump



H. M KEITH.

PUMP.

APPLICATION FILED JULY 10.}1920. 1,41 1,173. Patented Mar. 28, 1922.

v 2 SHEETS-SHEET 1- Pk *g *3 Q Q Q N {g x F ---J & 7 Q

I NVENTOR ATI'ORNEY WITNESS:

H. M. KEITH.

PUMP.

APPLl-CATlON FILED JULY 1041920.

Patented Mar. 28, 1922.

2 SHEETS-SHEET 2- UNITED STATES PATENT OFFICE.

HENRY M. KEITH, 01' WEST FRANKFORT, ILLINOIS.

PUMP.

To all whom it may concern Be it known that I, HENRY M. KEITH, a citizen of the United States, residing at West Frankfort, in the county of Franklin and State of Illinois, have invented new and useful Improvements in Pumps, of which the following is a specification.

This invention relates to rotary pumps, and has for its chief characteristicthe provision ofmeans carried by the drive shaft,

and operable to increase the force of the water supply.

I To this end, the invention makes use of a rotor disposed within the pump casing, and

including a pivoted sectionwhich is efi'ec tively maintained in contact with the wall of the casing to forcibly drive the water from the casing through the outlet ofthe pump. 7

Another object of the invention resides in the provision of a pump of the above mentioned character, wherein more than one roe tor maybe employed, the pump having a single inlet and outlet for all of the rotors, and the construction and arrangement of parts is such that leakage is prevented and the efiiciency of the pump increased.

The nature and advantages of the invention will be better understood when the following detail description is read in connection with the accompanying drawings, the invention residing in the construction, combination and arrangement of, parts as claimed.

In the drawings forming part of this application like numerals of reference indicate similar parts in the several views and wherein- Figure 1 is an elevation of the pump with one of the side plates removed.

Figure 2 is a vertical sectional view therethrough taken at right angles to Fi ure 1.

Figure 3 is a view on'an enlarge scale similar to Figure 2 of a duplex construction.

Referring to the drawings in detail, and particularly to Figures 1 and 2, 10 indicates the pump casing of the desired construction, one side 11 of the casing being removable as shown. A drive shaft 12 is rotatably mounted in bearings 13 and supports the rotor 14 within the casing 10. The rotor is of substantially cup-shaped formation in cross section, the opened end; of which is closed by means ofthe side mem- 7' Specification of Letters Patent. Patented lIal. 28, 1922. Application filed July 10, 1920.. Serial No. 395,250.

ber 11 ofthe casing. The shaft 12 maybe driven in any suitable manner and is equipped with a gear 15 for this purpose. A rotor is equipped with a packing ring 16 which bears against the member 11 of the casing as shown. The rotor includes a pivoted section 1 1 which is pivoted as at 17 and designed to provide a broad surface for increasing the force of the water supply. The hingeds'ection- 14' is permanently held in contact with the wall of the casing 10. Secured fto the member 11 of the casing is an eccentric 19havinga bore for the re ception of the drive shaft 12, which is provided to cause. thelpivoted or hinged section 14 of the rotor to travel in-a, true course around the wall of the casing 10. In-

terposed between the hinged section 14' of the rotor and the eccentric 19 is a roller 20 which moves over the periphery of the eccentric 19, a spring 21 being utilized to compensate for wear, and hold the hinged section 14 in effective engagement with the wall ofthe casing 10. The inlet of the pump is indicated at 22' and the outlet at 23, while interposed between said inlet and outlet is the packing 24 which bears against the periphery of the rotor 14. The packingis spring pressed, the spring being indicated at 25, while the tension of the spring is regulated by means of an adjusting element 26. As herein shown, the pump is equipped with valves at 27 controlling comoutlet 23 and the ,efiiciency of the pump is materially increased with the use of such valves when the pump is being operated at low speed. An air chamber is indicated at 28 arranged on top of the pum In Figure 3 I have illustrated a duplex construction, wherein the pump casing is indicated at 30 and of a size to accommodate more than one rotor, there being two of these elements illustrated in the figure mentioned. The casing 30 is divided into rotor chambers 31 by means of partitions 32 which are movable laterally but not rotatably. These partitions close the opened ends of the rotors 34 which are of the same construction as hereinabove described and carried by the drive shaft 35. Between the partitions I have positioned an expansible In the duplex construction there is but a single inlet and a single outlet for all of therotors, while the spring pressed packing 3'? is arranged to 'wipe the 'periphery'of each 7 rotor. elements against the rotors is regulated by the adjusting element 38. The shaft may be driven in any suitable manner and equipped with a gearing 39 for this purpose. The air chamber is indicated at 40.

In either of the constructions described,

the water or fluid is admitted to the casing of the pump through the inlet thereof, and as the rotor' is fixed upon the shaft for rotation therewith, this fluid is forced by the hinged sectionofthe rotor to travel in the same direction as the rotor, and is forcibly discharged through the outlet port of the pump. The packing arranged between the respective ports, prevent the fluid from passing beyond the outlet port through the inlet port, thus allowing the intake side of the pump to form a vacuum and therefore allow theoutside air pressurejto force the water or other fluid into the intake cham ber. By reason of the fact that the rotoris cup-shaped, the eccentric is positioned upon the same shaft as the rotor and arranged The tension of these packingv within the latter providing for a'very compact and efiicient disposition of parts.

While it is believed that from the foregoing description the nature and advantages of the invention will be readily ap parent, I desire to have it understood that, 'I do not limit myself to the details herein said shaft and securedto said casing, a coil spring. carried by said hinged section, ,a roller interposed between said eccentric and said spring, and an adjustablefspring'infiuenced packing disposed between said ports and engaging said rotor.

In testimony whereof I afiix my signature,

HENRY MKEITH. 

